Thread: 3 Axis Skull - tapping question

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I happen to have a couple lexan plates already cut for a Lindberg skull. The holes arent drilled but the plates are cut into shape. Let me double check that they fit properly... if so I could possibly send you one of them. I am not planning on making another 3 axis skull so I thought about just throwing them away.

PM me if interested.

We tap everything on the plate 4/40. I makes disassembly and reassembly much easier and faster than using nuts and bolts. For the holes through the skull I drill them slightly larger than 3/32 so that the 4/40 bolt has a little play. This makes it easier to line up the threads when securing the plate into the skull. Early on we used some small self tapping wood screws but these tended to split the plastic plate with repeated use. I recommend tapping. I'd also recommend getting some 4/40 tap kits at a place like Osh. They come with a 3/32 drill bit and a 4/40 tap.